Fan attachment.



FAN ATTACHMENT.

APPLIQATION FILED JULY 27, 1915.

Patented Apr. 25, 1916.

WITNESSES l/Vl/E/VTOR t i it t v GHATIRJLES 1E. GUSS, 0F ROBERT LEE, '1.II. as,

FAN ATTACHMENT.

arsenic.

Specification of Letters Patent.

Patented Apr. 25, 191th.

Application filed July 27, 1915. Serial lto. 42,140.

To all whom it may concern:

Be it known that I, CHARLES E. Goss, a citizen of the United States, anda resident of Robert Lee, in the county of Coke and 5 State of Texas,have invented a new and Improved Fan Attachment, of which the followingis a full, clear, and exact description.

The prime object of my invention is to 10 provide auxiliary fan bladesattachable to a fan having permanent blades whereby to increase the fansurface, by attaching the auxiliary blades, or reducing the fan surfaceto its normal area by detaching the auxiliary 5 blades.

The invention is more particularly intended for use in connection withthe fan employed on the Ford car, although not limited to thisparticular use. I have found it as effective with the Ford car in warmweather to increase the fan surface by additional blades, but theincreased area would be undesirable in cold weather.

My invention therefore comprises means 25 whereby the auxiliary bladesmay be readily attached or detached according to weather conditions, andit includes also means to hold the auxiliary fan blades against rattlingwhen in position on the ordinary fan.

The invention will be particularly explained in the specific descriptionfollowmg.

Figure 1 is a face view of an ordinary fan employed on the Ford car;Fig. 21s a face at View of my attachable fan unit; Fig. 3 1s a frontview of the Ford fan with my attachable fan in position thereon; andFig. 1s a perspective view of a slight modification in which theattachable fan unit resents at two fan blades instead of four, as s ownin Figs. 2 and 3.

The Ford fan represented in Fig. 1 comprises four stationary fan bladesa separately secured by fasteners b to the hub c, the

' head at, extendat securing bolt comprising a in through the hub.

shown in Figs. 2 and 3 presents four radial blades 10 integral with ahub 11, in the form an of a flat ringx,=the hub and fan bladesbelngpreferably stamped up from sheet meta At the base of each blade 10 acurved slot 12 is formed, the curve beingstruck from the center of thehub 11. A central hole 13 1s at formed in the hub 11 to permit theattach ment to pass over the bolt head (1 ,(Fig. l).

y improved attachable fan in the form 0 Tn applying the auxiliary fan tothe ordinary fan, so that the respective blades will alternate as inFig. 3, the auxiliary fan is passed over the bolt d, thehub 11 lyingagalnst the face of the hub c. The auxiliary fan Is then given a turnthrough a suflicient angle for the stationary fan blades a to bereceived in the slots 12. The angular position of the blades 10relatively to the hub 11 results in the inner portion of the blades 10at the slots 12 passing to the rear of the stationary blades a.

In order to prevent rattling and insure that there will be no accidentaldisplacement of the auxiliary fan, I provide in connection with one ormore of the blades 10, a coil spring 14, one end of which is hookedthrough orifices 15 in the blades 10, the opposite end of the springbeing formed with a hook which is engaged over an edge of an adjacentstationary blade (2.

It will thus be seen that the eiiiciency of the stationary blade will beincreased in proportion to the number of blades in the auxiliary fan,and improved cooling edects will be obtained in warm weather. On theother hand, when the additional blades would undesirably increase thecooling efiect in cold weather, the auxiliary fan may be readilydetached.

In the form shown in Fig. 4:, the auxiliary fan is the same in allrespects as that shown in Figs. 2 and 3, with the exception that but twoblades 10 are provided. The blades 10 are formed on a hub 11 similar tothe hub 11, there being curved slots 12 corresponding with the slots 12,and a central orifice 13 corresponding with the orifice 13.

Having thus described my invention, what it claim as new and desire tosecure by Letters Patent, is:

1. An auxiliary fan attachable to an ordinary fan to increase thereof,said auxiliary fan presenting fan blades, and a hub, the hub having anopening adapting'it to be passed over the securthe efieotive surface ingbolt of the ordinary fan and there being curved slots at the bases ofthe blades, the slotted portions of the auxiliary blades being adaptedto engage behind the blades of the ordinary fan when the hub of theauxiliary fan is turned through an angle in its own plane,'and beingadapted to be disengaged by areverse turning movement.

fan adapted to be ap- 2. An auxiliary increase the cf plied to anordinary fan to fective surface thereof,. and comprising radiating fanblades and a hub in the form of a flat ring having a central openingadapted to pass over the bolt head of an ordinary fan and there beingcurved slots extending from an edge of each fan blade, the curves beingstruck from the approximate center of the hub.

3. An auxiliary fan attachment for ordinary fans to increase theeffective surface thereof, comprising 'ahub having an axial opening andfan blades carried by said hub, said blades having means to engage thesame with blades of an ordinary fan.

4. An auxiliary fan attachment for ordinary fans to increase theeffective surface thereof, comprising a hub adapted to be secured inline-with the hub of an ordinary fan and fan blades carried'by saidhub,a coil spring secured at one end toa "blade of the auxiliary fan, thesaid spring having a, length and the opposite end thereof having meanswhereby it may be hooked over an edge of the blade of the .ordinary fan.

5. The combination with a fan including fan blades, of an auxiliary fanpresenting fan blades and a hub, said auxiliary blades having members atthe base thereof engaging behind the blades of the first fan andturnable through an. angle to disengage the said members from saidblades of the first fan.

6. The combination with a fan including fan blades,

of an auxiliary fan presenting ing behind the blades of. the first fanand turnable throu h an angle to disengage the said members from saidblades of the first fan, together with spring means forming a connectionbetween certain blades of the respective fans.

7. An auxiliary fan for attachment to an ordinary fan to increase theeffective surface thereof, the blades of which auxiliary fan areprovided with means to detachably engage said blades directly with theblades of an ordinary fan.

. 8. A fan including a hub, fan blades thereon, and auxiliary blades indetachable engagement with the first blades.

9. A fan including a hub, fan blades thereon, and auxiliary blades indetachable engagement with the first blades and adapted to be turnedthrough an angle about the axis of the fan and relatively to the saidfirst blades to detach said auxiliary blades.

10. A fan including a hub, blades thereon, and auxiliary blades having ahub in the form of a ring and lying adjacent to the hub of the firstblades, the said auxiliary blades having curved slots in which theadjacent edges of the first blades are received, said auxiliary bladesbeing turnable about the axis of the fan, through an angle to disengagethe said auxiliary blades from the first blades. y

In testimony whereof I have subscribed my name to this specification inthe presence of two subscribing witnesses.

CHARLES E. GOSS. Witnesses:

FRED ROE, C: E. SUMMERS.

